Title: [Wireshark-users] monitor an STM-1 link
Hi
John,
the
case is, that for monitoring purpose, both forward and backward link direction
has to be connected to an Rx port on the monitoring device, otherwise the
monitor device would influence the original traffic through the Tx port that we
definitely do not want.
Tamas
From: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Sheahan,
John
Sent: Monday, June 09, 2008 14:56
To: Community support
list for Wireshark; wireshark-users@xxxxxxxxxxxxx
Subject: Re:
[Wireshark-users] monitor an STM-1 link
if you are using a passive
tap, you should be able to maintain bidirectional connectivity on the STM-1 and
the link should have come back up. Perhaps you're tap is not
passive?
From: wireshark-users-bounces@xxxxxxxxxxxxx on
behalf of Tamás Varga
Sent: Mon 6/9/2008 8:25 AM
To:
wireshark-users@xxxxxxxxxxxxx
Subject: [Wireshark-users] monitor an
STM-1 link
Hi Experts,
we want to monitor the traffic of an STM-1
(OC-3) link
between two Cisco LS1010 ATM switches. For this purpose,
we
put an optical splitter in both forward and backward
direction that produces
-26 dBm signal level on the
monitored link. The receiver sensitivity on the
monitor
device is stated to be -28 dBm. The receiver link on
the monitor
node does not go up (after administrative shut
down is
disabled).
Questions, if someone has experience:
- is it possible to
force link up even no Tx I/F connected?
- does STM-1 need to have
bidirectional
connectivity?
thanks,
Tamas
+---------+
+---------+
|
Tx-----------------T--------(dampener)->Rx
|
| LS1010
|
|
| LS1010 |
|
Rx<--(dampener)----------T--------------Tx
|
+---------+
|
|
+---------+
|
|
v
v
+-----------+
|Tx Rx Tx
Rx|
|
|
| Monitor
|
| LS1010
|
+-----------+
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